traininfo/provider/XmlTimetableProvider.java

package dk.thoerup.traininfo.provider;

import java.util.ArrayList;
import java.util.List;

import org.w3c.dom.Document;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.util.Log;
import dk.thoerup.traininfo.TimetableBean;
import dk.thoerup.traininfo.util.AndroidTimeoutCache;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.XmlUtil;

public class XmlTimetableProvider implements TimetableProvider {
        
        final static int CACHE_TIMEOUT = 60*1000;

        AndroidTimeoutCache<String,List<TimetableBean>> timetableCache = new AndroidTimeoutCache<String,List<TimetableBean>>(CACHE_TIMEOUT);    

        @Override
        public List<TimetableBean> lookupTimetable(String type, String trainID) {
                
                String trainNumber = extractTrainNumber(trainID);
                
                String key = type + "-" + trainID;
                List<TimetableBean> timetables = timetableCache.get(key);
        
                if (timetables == null) {                       
                        timetables = lookupTimetableWorker(type, trainNumber);
                        
                        if (timetables != null) {                       
                                timetableCache.put(key, timetables);
                        }
                        
                } else {
                        Log.i("XmlTimetableProvider", "cache hit !!!");
                }               
                
                return timetables;
        }
        

        public List<TimetableBean> lookupTimetableWorker(String type, String trainNumber) {

                String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
                Log.i("url", url);
                try {
                        List<TimetableBean> timetables = new ArrayList<TimetableBean>();
                        
                        String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
                        
                        
                        Document doc = XmlUtil.parseXML(xml);
                        Node rootNode = doc.getDocumentElement(); // stations
                        NodeList stationList = rootNode.getChildNodes();
                        

                        for (int i=0; i<stationList.getLength(); i++) {
                                Node entryNode = stationList.item(i);
                                
                                if (! entryNode.getNodeName().equals("entry"))
                                        continue;
        
                                TimetableBean timetable = new TimetableBean();
                                
                                NodeList entries = entryNode.getChildNodes();                           
                                
                                if (entryNode.hasAttributes() && entryNode.getAttributes().getNamedItem("current") != null) {                                   
                                        timetable.setCurrent( Boolean.parseBoolean(entryNode.getAttributes().getNamedItem("current").getNodeValue()));
                                } else {
                                        timetable.setCurrent(false);
                                }
                                
                                for (int j=0; j<entries.getLength(); j++) {     
                                        Node current = entries.item(j);
                                                                                
                                        String content = null;
                                        if (current.getFirstChild() != null) 
                                                content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
                                        
                                        String nodeName = current.getNodeName();
                                        
                                        if (nodeName.equals("station"))
                                                timetable.setStation( content );                                                
                                        
                                        if (nodeName.equals("arrival"))
                                                timetable.setArrival( content );
                                        
                                        if (nodeName.equals("departure"))
                                                timetable.setDeparture( content );
                                        
                                        if (nodeName.equals("stationid"))
                                                timetable.setStationId( Integer.parseInt(content));
                                        
                                        /*if (nodeName.equals("current"))
                                                timetable.setCurrent( Boolean.parseBoolean(content) );*/

                                }
                                timetables.add(timetable);                              
                        }
                        return timetables;
                        
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                }

                return null;
        }
        
        private String extractTrainNumber (String trainID) {

                String parts[]  = trainID.split(" ");
                if (parts.length == 2) {
                        return parts[1];
                } else {
                        return parts[0];
                }
        }

}
1	torben	352	package dk.thoerup.traininfo.provider;
2
3			import java.util.ArrayList;
4			import java.util.List;
5
6			import org.w3c.dom.Document;
7	torben	391
8	torben	352	import org.w3c.dom.Node;
9			import org.w3c.dom.NodeList;
10
11			import android.util.Log;
12			import dk.thoerup.traininfo.TimetableBean;
13	torben	391	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
14	torben	352	import dk.thoerup.traininfo.util.DownloadUtil;
15			import dk.thoerup.traininfo.util.XmlUtil;
16
17			public class XmlTimetableProvider implements TimetableProvider {
18
19	torben	391	final static int CACHE_TIMEOUT = 60*1000;
20	torben	352
21	torben	1027	AndroidTimeoutCache<String,List<TimetableBean>> timetableCache = new AndroidTimeoutCache<String,List<TimetableBean>>(CACHE_TIMEOUT);
22	torben	352
23			@Override
24	torben	1007	public List<TimetableBean> lookupTimetable(String type, String trainID) {
25	torben	391
26	torben	699	String trainNumber = extractTrainNumber(trainID);
27
28			String key = type + "-" + trainID;
29	torben	1027	List<TimetableBean> timetables = timetableCache.get(key);
30	torben	391
31			if (timetables == null) {
32	torben	1007	timetables = lookupTimetableWorker(type, trainNumber);
33	torben	391
34	torben	1007	if (timetables != null) {
35	torben	1027	timetableCache.put(key, timetables);
36	torben	391	}
37
38			} else {
39			Log.i("XmlTimetableProvider", "cache hit !!!");
40			}
41
42	torben	1007	return timetables;
43	torben	391	}
44
45
46	torben	1007	public List<TimetableBean> lookupTimetableWorker(String type, String trainNumber) {
47
48	torben	699	String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
49	torben	352	Log.i("url", url);
50			try {
51	torben	1007	List<TimetableBean> timetables = new ArrayList<TimetableBean>();
52	torben	352
53			String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
54
55
56			Document doc = XmlUtil.parseXML(xml);
57			Node rootNode = doc.getDocumentElement(); // stations
58			NodeList stationList = rootNode.getChildNodes();
59
60
61			for (int i=0; i<stationList.getLength(); i++) {
62			Node entryNode = stationList.item(i);
63
64			if (! entryNode.getNodeName().equals("entry"))
65			continue;
66
67			TimetableBean timetable = new TimetableBean();
68
69	torben	365	NodeList entries = entryNode.getChildNodes();
70
71			if (entryNode.hasAttributes() && entryNode.getAttributes().getNamedItem("current") != null) {
72			timetable.setCurrent( Boolean.parseBoolean(entryNode.getAttributes().getNamedItem("current").getNodeValue()));
73			} else {
74			timetable.setCurrent(false);
75			}
76
77	torben	352	for (int j=0; j<entries.getLength(); j++) {
78			Node current = entries.item(j);
79
80			String content = null;
81			if (current.getFirstChild() != null)
82			content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
83
84			String nodeName = current.getNodeName();
85
86			if (nodeName.equals("station"))
87			timetable.setStation( content );
88
89			if (nodeName.equals("arrival"))
90			timetable.setArrival( content );
91
92			if (nodeName.equals("departure"))
93			timetable.setDeparture( content );
94
95	torben	840	if (nodeName.equals("stationid"))
96			timetable.setStationId( Integer.parseInt(content));
97
98	torben	365	/*if (nodeName.equals("current"))
99			timetable.setCurrent( Boolean.parseBoolean(content) );*/
100	torben	352
101			}
102			timetables.add(timetable);
103			}
104	torben	1007	return timetables;
105	torben	352
106
107			} catch (Exception e) {
108			Log.e("XmlStationProvider", "lookupStations: ", e);
109			}
110	torben	699
111	torben	1007	return null;
112	torben	352	}
113	torben	699
114			private String extractTrainNumber (String trainID) {
115	torben	352
116	torben	699	String parts[] = trainID.split(" ");
117			if (parts.length == 2) {
118			return parts[1];
119			} else {
120			return parts[0];
121			}
122			}
123
124	torben	352	}